[Linux-decnet-user] LATD: problem with DECServer 90L+

[<hic...@se...>]

Hi guys,

I've googled the web but didn't find anything suitable .. maybe you could
help.

We have several terminals, connected to terminal server, which speaks LAT
only (no telnet). It connected the terms to a VAX machine. Now the VAX
will be shutdown and removed, but they want to keep terminals for
students access to e-mail.

I put latd 1.15 from debian unstable package on my linux woody server
named Phobos. Things seem to start good, when I 'c phobos' from a vt420
connected to 90L+, the terminal server discovers via dec broadcast the MAC
address of the server and starts talking to it.

I've captured the communication, 08-00-etc is the term server, 00-50-etc
is the linux box:

1. 08-00-2b-31-0d-e4 -> 00-50-da-44-0c-70
   C, Start, 0x7304->0x00

2. 00-50-da-44-0c-70 -> 08-00-2b-31-0d-e4
   R, Start, 0x35->0x7304
3. the same as 2
4. the same as 2

.. after the first query from term server, there are 21 equivalent
responses sent from linux box. These are ignored by term server, no
more messages addressed from 0x7304 to 0x35 appear.

Then term server asks the C, Start again, and linux box responds with the
same packets as before, only the number is one higher (0x36).

When the linux box timeouts on the circuit, it sends 21 C, Stop messages
from 0x35. The same happens several times around, the amount of messages
the linux box sends is always different.

When they reach 0x3d, the term server gives up and terminal shows "Service
Unavailable" error. Then term server sends C, Stop, 0x00->0x00 .. and
linux box sends more than hundred C, Stop, 0x3D->0x7304 LAT packets.

Many thanks for any idea as to what can be wrong.
-- 
jozef  :-)